

//给span标签一个类  将其对应的段落的关键句显示在step2
function getKey(id){
	var $right=$(id).children(".the-key-line");
	var length=$right.length;
	$(".step-two-info").html("对应段无关键句");
	var text='';
	if (length==1) {
		text=$right.text();
		$(".step-two-info").html(text);
	}else if(length>1){
		for (var i = 0; i < length; i++) {
	       text+=$right[i].text();
           if (i!=length-1) {
            text+='<br>';
           }
		}
        $(".step-two-info").html(text);
	}
}